lwp_memheap.h
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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-06-10 Bernard first version
*/
#ifndef __LWP_MEMHEAP_H__
#define __LWP_MEMHEAP_H__
#include <stdint.h>
#include <rtthread.h>
/**
* memory item on the heap
*/
struct rt_lwp_memheap_item
{
rt_uint32_t magic; /**< magic number for memheap */
struct rt_lwp_memheap *pool_ptr; /**< point of pool */
struct rt_lwp_memheap_item *next; /**< next memheap item */
struct rt_lwp_memheap_item *prev; /**< prev memheap item */
struct rt_lwp_memheap_item *next_free; /**< next free memheap item */
struct rt_lwp_memheap_item *prev_free; /**< prev free memheap item */
};
/**
* Base structure of memory heap object
*/
struct rt_lwp_memheap
{
struct rt_object parent; /**< inherit from rt_object */
void *start_addr; /**< pool start address and size */
rt_uint32_t pool_size; /**< pool size */
rt_uint32_t available_size; /**< available size */
rt_uint32_t max_used_size; /**< maximum allocated size */
struct rt_lwp_memheap_item *block_list; /**< used block list */
struct rt_lwp_memheap_item *free_list; /**< free block list */
struct rt_lwp_memheap_item free_header; /**< free block list header */
struct rt_semaphore lock; /**< semaphore lock */
rt_list_t mlist;
};
extern rt_err_t rt_lwp_memheap_init(struct rt_lwp_memheap *memheap, const char *name, void *start_addr, rt_uint32_t size);
extern void *rt_lwp_memheap_alloc(struct rt_lwp_memheap *heap, rt_uint32_t size);
extern void rt_lwp_memheap_free(void *ptr);
extern void *rt_lwp_memheap_realloc(struct rt_lwp_memheap *heap, void *ptr, rt_size_t newsize);
extern rt_bool_t rt_lwp_memheap_is_empty(struct rt_lwp_memheap *memheap);
extern rt_bool_t rt_lwp_memheap_unavailable_size_get(void);
#endif